Covid-19 vaccine boosters may be necessary. Here's what you need to know
Vaccine makers are preparing for a next possible phase of the Covid-19 vaccine rollout: booster doses.
![Covid-19 vaccine boosters may be necessary. Here's what you need to know](https://cdn.cnn.com/cnnnext/dam/assets/210621021756-covid-vaccine-new-york-0618-super-169.jpg?#)
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Filename: database/DB_driver.php
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File: /home1/redzatco/public_html/politys/application/config/config.php
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Function: DB
File: /home1/redzatco/public_html/politys/index.php
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Function: require_once